Azure Virtual Desktop (AVD) requires a license for each user who will access the virtual desktop environment. The license is tied to the user and not the device, allowing users to access their virtual desktop environment from multiple devices.

There are two main licensing options for AVD:

1. Windows 10 or 11 Enterprise E3 or E5: This license is required for users who will access the virtual desktop environment running Windows 10 or 11 Enterprise.
2. Windows Virtual Desktop Access (VDA) E3 or E5: This license is required for users who will access the virtual desktop environment from a non-Windows device, such as a Mac or a Chromebook.

It is important to note that the licensing requirements for AVD can change, and organizations should check with Microsoft or a licensing specialist such as Microsoft resellers for the most up-to-date information on licensing requirements and pricing.